<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <p>用户名：{{ username }}</p>
    <p>书名：{{ book.name }}</p>
    <p>作者：{{ book.author }}</p>
    <p>{{ books.1 }}</p> <!-- 访问列表中的第二个元素 -->
    <p>{{ person.name }}</p>
    <p>{{ person.eat }}</p>
    <p>{{ person.name }}</p>
    {% include 'biaoqian.html' with biaoqian="book.biaoqian" %} <!-- 引用模板 -->
</body>
</html>